Emotions are the feelings of every being in the universe, whether magical or non-magical. Within the magical world, emotions play a big role, since it's the foundation for all magic. Without emotions, magical beings cannot access and use their powers. With them, they can amplify, depending on the strength of the emotion.

Leo often says powers come from emotions, but each power might require a different trigger. When Prue and Piper first received their powers, their triggers were anger and fear, respectively. Alternatively, a Whitelighter must trigger the love they feel for a charge in order to heal them.

Whitelighters and Cupids are connected emotionally to their charges. Whenever their charge is in panic, scared or in pain, they feel it and if their charge is killed, the connection is then broken permanently.

While humans can handle the entire rainbow of emotions, demons can't. In fact, it kills them. Some beings are said to have no emotions and in the case of pure blooded demons, they possess limited undesirable emotions.

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Although it is said that humans can handle the entire rainbow of emotions, they can't handle all of them at once. They will be driven insane if they are forced to experience multiple emotions and in worst cases, be killed. However, a mentally strong person can learn to embrace the emotions and project them into strength. Prue Halliwell was able to do this when she temporarily became an Empath.

The way magical beings access, use, and strengthen their powers is through their emotional conditions. Without them, they are rendered powerless. Like humans, magical beings can handle the entire rainbow of emotions, but some species have been known to not be able to experience certain emotions.

Those beings capable of controlling and channeling emotions into their powers are very powerful. Empaths, for example, can use emotions to control and use powers of other beings by use of their Empathy power. If they can evolve their power to an advanced form, Empaths can eventually manipulate emotions to kill their opponents.

Phoebe Halliwell did this in an alternate future, where she killed baseball player Cal Greene, who had murdered a close friend of hers. Phoebe manipulated Greene's emotions by forcing him to feel his magnified anger and the pain of his victims.

Many demons feed on undesirable emotions, such as rage and anger, to make themselves stronger and more powerful. However, they can overdose and explode if they absorb too much, proving that even emotions that demons desire and can handle can also be lethal to them.

Lord Dyson, a repression demon, is one of the many demons that has this power. Unfortunately, he made the ill-fated decision to feed on Leo Wyatt's pent up rage and hostilities and it proved fatal, killing him in a huge explosion. This proves the age old cliche that too much of a good thing can prove to be a bad thing.

Banshees are able to convert a witch into a Banshee with their scream. While their screams kill mortals, it turns a witch by zeroing in on the pain of that witch. The conversion can only be reversed before the first kill. The person who caused the turned witch emotional pain, has to express clearly how they feel. This will allow the turned witch to turn back to her normal state.

Furies kill their victims by breathing poisonous smoke into their victims. However, if they breath this smoke into a witch, it may open up a portal of unexpressed anger. The anger will eventually consume the witch's humanity, turning her into a fury. To turn a fury back into her former state as a witch, the portal of unexpressed anger must be closed.

In 2001, Piper Halliwell got smoked by a fury. Her unexpressed anger towards her late sister Prue caused her to turn into a fury.

Vortex Minions can create worlds based on their victims emotions, desires, and dreams. They then create a vortex, which traps their victim into that world. The victim can only escape by vanquishing the vortex minion. If not, the minion will kill the victim in their own world.

In 2003, a vortex minion by the name of Gith, trapped each of the Charmed Ones in their own worlds. Piper's world was magic-free; in Paige's world, everyone knew of magic and witches; and in Phoebe's world (which was actually based on Jason Dean's dreams), she was a successful columnist with her own TV show.

Certain spells are written to affect someone's emotions, however, the results are never desired and can be dangerous if the spell is not reversed in time. However, some spells can use emotions to help someone else.

A spell written by Paige Matthews in 2002. The spell allows to make a person feel the feelings of another person. Paige had written the spell to make Cole realize Phoebe's feelings for him.

Paige rewrote the spell a year later to fit Piper, when she was turned into a Valkyrie and could not express her true emotions, due to a Memory Spell. Phoebe, who had recently become an Empath, could feel her true emotions and this spell allowed for those emotions to float into Piper.

Another spell written by Piper Halliwell. In 2004, when the world had turned hyper-happy and while she was in the hospital ready to give birth to Chris, Piper was worried that her sisters would be killed if they kept acting negatively and had written this spell in order to turn them overly happy like herself.

At a crime scene, Phoebe, under the influence of a sin ball, met officer Dean. The two were just about to have sex, when they were caught by Prue and Darryl. The officer was fired by Darryl, and Lukas infected the officer with the anger-sin ball. This caused him to go to the manor to kill Phoebe.

The only way to get rid of a sin ball is by performing a selfless act. The only sin that cannot be removed by the infected is Pride, since you can't be selfless in a prideful state.

Demons are repeatedly said not to be capable of feeling emotions, however, they were seen to at least be able to feel negative emotions such as anger, frustration and fear. They can also access magical powers, so it would appear that even evil beings can feel emotions.